I was just recently banned from a L4D2 server for "wallhacking"
I did not wallhack although I did do a certain glitch allowing me to spawn just before going through saferoom door.
This is something in the game and I'm fairly new to the server and I don't know if there were any rules against the glitch, but I certainly wasn't wallhacking. It sucks to get a permanent ban for something that I didn't do or was aware about as I really enjoy the server.
The video is just an example of the glitch.(I didn't make it)